import { useState } from 'react';
import PropTypes from 'prop-types'
const DemoStateChild = (props) => {
    const [ncount] = useState(() => {
       if (props.initCount === 1) {
         return props.initCount + 2 
       }
       return props.initCount + 5
    })
    return (
     <>
        child依赖父组件的count做一些逻辑:<br />
        props.initCount：{props.initCount}-ncount:{ncount}
     </>
    );
}
DemoStateChild.propTypes={
   initCount: PropTypes.number.isRequired
} 
export default DemoStateChild;